If you've got an expired credit card, a drill, and a utility knife, you can make the perfect holder for your favorite earbud headphones.

This is more of a permanent solution than the previously mentioned method using old cards to stow headphones, and it's definitely more pocket-friendly (which, less face it, is the real problem here). Using this method will not only stave off line tangles, but it can help extend the life of the buds, too.